Gun-lock



UNITED STATES PATENT OEEICE.

JOSEPH H. WESSON, OF SPRINGFIELD, MASSACHUSETTS.

GUN-LOCK.

SPECIFICATION forming part of Letters Patent No. 243,183, datedJ'ur'xe 21, 1881. Application filed April 1a; issifgfmo model.)

' The object of my invention is to obviate the necessity of cocking the'hammers of double guns withihe thumb each time itis de'sired to discharge one of the barrels, and to accomplish the said cooking of the hammers or moving back ofthe exploding-piece by the movement of' thetrigger alone, and I obtain this result by the mechanism substantially. hereinafter described, and illustrated in the accompanying drawings. I

Figure I is a side view of a double `breechloading fire-arm made according to my inven tion.; Fig, II is a horizontal longitudinal section of the same at line D. Fig. III is a side View of the lock mechanism. Fig. I'V is a vertical section of the trigger and a portion ot' the two sears at line F of Fig. III. vFig. V is a vertical transverse section of the two auxiliary tumblers and thepivot or trunnion which connects thennwith the haminer-tuniblers and their stirrups in place thereon. Fie'. VI is aside View ofthe auxiliary tumbler, and Fig. VII is a front view ofthe two auxiliary tumblers and the pivot or trunnion which connects them, and upon which they revolve.

In the drawings, A represents the frame of a double gun having a`longitudihalcentral plate, A', to which the lock mechanism is secured. v

E denotes the breechplate, and Bothe two barrels.

1 denotes an auxiliary tumbler, having a pivot-or trunuion, as 16, which may be of any desired size having a bearing in a hole in or through the middle plate, A', one of said tumblers on each sideof the plato A' and one may be made solid with the pivot or Vtrunnion 16, andthe other connected therewith or secured thereto by screws or pins', as shown clearly in Fig. V. Each auxiliary tumbler 1 is provided with a series of n'otches, as 2, each notch in either anxiliarytumbler. being located opposite a point midway between two notches in the other auxiliary tumbler, as shown in full lines, and' in dotted lines in Figs. I and VI.

A hammer, 14, of any desired form," and adapted to operate either outside or inside the frame, is provided at its lower part with the tumbler, as 5, aud with a pivotfstud, as 6, either made solid therewith or separate, which pivot-stud may have a bearing at one end in the trunnion 16, andat the other end, if de. sirable, in the lo'ckJ-pla te, in such a manner that lboth the auxiliary tumblers 1 may revolve inidependently of either hammer-tumbler.

A stirrup, as 4, is pivoted to the rear part of the hammer-tumbler 5, whose upper end has a bearing in the hooked end of the mainspri g 20, and whose lower endis somewhat elongated below its pivot, and bears against the inside ofthe slot 17 when the nose of the hamineris against the tiringpn, causing the upper end of the stirrup to ride up theincline of the hook at the extrcmityof the mainspring, which con.- struction operates to movethe hammer back a little or rebound it from its contact with the tire-pin. `This particular rebounding feature ot' the lock mechanism is not, however, a part of my invention, and needs no further description here.

The rear part of the tumbler may lie-made.

of any desired form, and is provided with a lnotch, as 3, located at the same distance from the axis ot'uthe tumbler 5 as the notches 2 are distant from the axis of the disk l, both axes being coincident. y

f In the lower part o f the frame A, and be-V neath the middle plate, A', is pivoted the trigger 9, with a trigger-spring, as 8, in the fra-me,

engaging with the rearpart ot' the trigger to hold its front part in its most elevated position.

Two sears or dogs, as 7, are pivoted. in the forward and upper 'part ot' the trigger', these sears being forked or extending outward each Way at their upper end, so that the catch on the upper end of each will impiuge against one ofthe hammer-tumblers, and also the auxiliary tumbler by its side, and a small stud or pin, `as 12, projects out from the plate A' on each side in front of each'sear 7, and a spring, as 11, operates to hold the catch on the timiei'elid ofthe sear into engagement with the notch 3 in the hammer-tumbler 5.

The auxiliary tumbler 1 should be fitted in its bearings, so that it will turn with suiicient I friction to remain-in any position into. which 'case one of the scar-catches is engaged in lthe notch fi'ofI therham mer-'tnmbler5, and also with the notch 2 'in the auxiliary tumbler 1 by its side, both these notches forming substantially one notch when they coincide, with both of which the catch of one sear will engage. It" the trigger be pulled backward, both sears 7 will be drawn down, the catch of the sear which is not in engagement with the'tumblernotch riding down against the periphery of, the auxiliary tumbler on that side as the latter revolves. .The searon the opposite side, however, whose catch is in engagement with the notch of the corresponding ham mer-tumbler 5, draws down that part of. the hammer-tumbler, and also revolves the auxiliary tumbler' until, as the sear moves down far en`ough,it impin ges against the projecting stud 12, which throws the seareatch .out of' engagement with the notch 3 of' the.hannnertumbler, and also out of engagement with the notch 2 in the auxiliary tumbler and the hammer, made upon or connected with the tumbler 5, actuated by its mainsprin g 20,quickly moves forward against the fire-pin 15 and explodes the charge, the auxiliary tumbler 1 remaining in the position where it was left when released by the sear. As the tumbler 5 and its hammer moved forward to explode the charge the notch 3 in the hammer-tumbler 'on that sidemoved up to a point between two adjacent notches 2in the disk l, so that as that sear moves up again on releasing the trigger its catch rides against the periphery of the disk or auxiliary tumbler 1, and cannot enter the notch 3 of that hammer-tumbler. As the two auxiliary tumblers 1 are connected together and revolve tQgether, the movement of the sear just described, in discharging the arm, revolved the auxiliary tumbler 1 ofthe other lock, so as to bring one of the notches 2 therein into a position by the side of or coincident with the notch 3 ilr-that hammer-tumbler 5, so that when the pressure against the trigger isreleased the catch of that sear rides up against the tumblers on that 'side until it enters the coincident notches therein, which occurs when the trigger has moved to lits forward position. The scar, which in this last movement downward revolved the hammer-tumbler and moved the hammer tb discharge the arm in its movement upward, rides upon the periphery of its auxiliary tumbler 1, but cannot enter thenotch 3 in the corresponding hammer-tumbler, as the latter does not coincide with the notch 2 in its auxiliary tumbler, and therefore when the trigger is again pulled that disengaged sear rides down on the peripheryof the auxiliary tumbler on that side, while the engaged sear on the opposite side draws down the hammer-tumbler 5 and raises the hammer, and, impinging against the stud 12 on that side, releases the hammer, which is forced forward by its mainspring to strike the fire-pin. In

this manner the'twofauxiliary'tumblers lare given an intermittent rotary movement, so that the notches 2 therein are alternately brought into a position coincident with the notch in the.hammer-tumblers 5, and the hammers are alternately operated to discharge the arm by the simple successive movements of the trigger backward, and without other manipulation of the arm, except to insert the cartridges.

It'it should be desired to make a differentlymoving hammer, or a hammer made separate from its tumbler 5, which might involve a change in location ot' the parts, as well as a .change in form, it might be done without de- 'parting from the invention. For example, the

notches in the auxiliary tumblers or disks l might be reversed, and in some classes of arms it might be desirable to locate the auxiliary tumblers and the hammer-tumblers in such relative position to the trigger that the latter would be elongated in rear ofthe pivot on which it'swings in the frame instead of in front, and `the sears 7, pivoted to this rearward elongation, sogas to push `against the notches-in both tumblers when the trigger was pulled, instead of pulling against them, as above described.

It is evident thatinstead of the notches 2, made in the'periphery of the disk or auxiliary tumbler 1, elongated bosses or projections may he made on the. side of each disk, near the periphery, .to answer the saine purpose.

Having thus described my invention, what I claim as new is The combination, in a double gun, of two disks or auxiliary tumblers,one on each side the frame, and both connected so as l,to rotate together, and each provided with notches -in .its periphery, any one of which notches is equi- 

